Buggy code:
public class JdbcDriverAdd extends AbstractAddStepHandler { static final JdbcDriverAdd INSTANCE = new JdbcDriverAdd ( ) ; protected void populateModel ( ModelNode operation , ModelNode model ) { } protected void performRuntime ( OperationContext context , ModelNode operation , ModelNode model , ServiceVerificationHandler verificationHandler , List < ServiceController < ? > > newControllers ) throws OperationFailedException { final String driverName = operation . require ( Constants . DRIVER_NAME . getName ( ) ) . asString ( ) ; final String moduleName = operation . require ( Constants . DRIVER_MODULE_NAME . getName ( ) ) . asString ( ) ; final Integer majorVersion = ( operation . hasDefined ( Constants . DRIVER_MAJOR_VERSION . getName ( ) ) ) ? operation . get ( Constants . DRIVER_MAJOR_VERSION . getName ( ) ) . asInt ( ) : null ; final Integer minorVersion = ( operation . hasDefined ( Constants . DRIVER_MINOR_VERSION . getName ( ) ) ) ? operation . get ( Constants . DRIVER_MINOR_VERSION . getName ( ) ) . asInt ( ) : null ; final String driverClassName = ( operation . hasDefined ( Constants . DRIVER_CLASS_NAME . getName ( ) ) ) ? operation . get ( Constants . DRIVER_CLASS_NAME . getName ( ) ) . asString ( ) : null ; final String dataSourceClassName = ( operation . hasDefined ( Constants . DRIVER_DATASOURCE_CLASS_NAME . getName ( ) ) ) ? operation . get ( Constants . DRIVER_DATASOURCE_CLASS_NAME . getName ( ) ) . asString ( ) : null ; final String xaDataSourceClassName = ( operation . hasDefined ( Constants . DRIVER_XA_DATASOURCE_CLASS_NAME . getName ( ) ) ) ? operation . get ( Constants . DRIVER_XA_DATASOURCE_CLASS_NAME . getName ( ) ) . asString ( ) : null ; final ServiceTarget target = context . getServiceTarget ( ) ; final ModuleIdentifier moduleId ; final Module module ; try { moduleId = ModuleIdentifier . create ( moduleName ) ; module = Module . getCallerModuleLoader ( ) . loadModule ( moduleId ) ; } catch ( ModuleLoadException e ) { context . getFailureDescription ( ) . set ( ConnectorMessages . MESSAGES . failedToLoadModuleDriver ( moduleName ) ) ; return ; } if ( driverClassName == null ) { final ServiceLoader < Driver > serviceLoader = module . loadService ( Driver . class ) ; if ( serviceLoader != null ) for ( Driver driver : serviceLoader ) { startDriverServices ( target , moduleId , driver , driverName , majorVersion , minorVersion , dataSourceClassName , xaDataSourceClassName ) ; } } else { try { final Class < ? extends Driver > driverClass = module . getClassLoader ( ) . loadClass ( driverClassName ) . asSubclass ( Driver . class ) ; final Constructor < ? extends Driver > constructor = driverClass . getConstructor ( ) ; final Driver driver = constructor . newInstance ( ) ; startDriverServices ( target , moduleId , driver , driverName , majorVersion , minorVersion , dataSourceClassName , xaDataSourceClassName ) ; } catch ( Exception e ) { ConnectorLogger . SUBSYSTEM_DATASOURCES_LOGGER . cannotInstantiateDriverClass ( driverClassName , e ) ; <START_BUG> throw new OperationFailedException ( new ModelNode ( ) . set ( "Unable<seq2seq4repair_space>to<seq2seq4repair_space>instantiate<seq2seq4repair_space>driver<seq2seq4repair_space>class.<seq2seq4repair_space>See<seq2seq4repair_space>log<seq2seq4repair_space>(WARN)<seq2seq4repair_space>for<seq2seq4repair_space>more<seq2seq4repair_space>details" ) ) ; <END_BUG> } } } private void startDriverServices ( final ServiceTarget target , final ModuleIdentifier moduleId , Driver driver , final String driverName , final Integer majorVersion , final Integer minorVersion , final String dataSourceClassName , final String xaDataSourceClassName ) throws IllegalStateException { } }

Fix:
throw new OperationFailedException ( new ModelNode ( ) . set ( ConnectorMessages . MESSAGES . cannotInstantiateDriverClass ( driverClassName ) ) ) ;